Concentration of Testosterone and Cholesterol in Blood Serum of Servicing Bulls Depending on Their Type of Productivity, Age and the Season

Amerkhanov, Kh. A.; Абилов, А.И.; ЕСКИН, Г.В.; Комбарова, Н.А.; Turbina, I. S.; Федорова, Е. В.; Varennikov, M.V.; Гусев, A. В.

doi:10.15389/agrobiology.2014.2.59eng

Cited by 4 publications

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“…Cholesterol is the building block of TT where Leydig cells derive most of what they need to produce TT by absorbing cholesterol in the blood. With cholesterol playing a role as a precursor for TT, studies have shown that the higher the cholesterol content, the higher the TT concentration in bulls ( Amerkhanov et al, 2014 ). Moreover, evidence for alterations in cholesterol biosynthesis between the two dietary treatment groups was established through the differential expression of EBP .…”

Section: Discussionmentioning

confidence: 99%

Effect of plane of nutrition during the first 12 weeks of life on growth, metabolic and reproductive hormone concentrations, and testicular relative mRNA abundance in preweaned Holstein Friesian bull calves

Coen

Keogh

Byrne

et al. 2021

Journal of Animal Science

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The objective of this study was to examine the effect of nutrition during the first 12 wk of life on aspects of the physiological and transcriptional regulation of testicular and overall sexual development in the bull calf. Holstein Friesian bull calves with a mean ±SD age and bodyweight of 17.5 (2.85) days and 48.8 (5.30) kg, respectively, were assigned to either a high (HI; n=15) or moderate (MOD; n=15) plane of nutrition and were individually fed milk replacer and concentrate to achieve overall target growth rates of at least 1.0 and 0.5 kg/day, respectively. Throughout the trial, animal growth performance, feed intake, and systemic concentrations of metabolites, metabolic and reproductive hormones were assessed. Additionally, pulsatility of reproductive hormones (luteinising hormone (LH), follicle stimulating hormone (FSH) and testosterone (TT) was recorded at 15 min intervals during a 10-h period at 10 wk of age. At 87 ± 2.14 days of age, all calves were euthanized, testes weighed, and testicular tissue harvested. Differential expression of messenger ribonucleic acid (mRNA) candidate genes involved in testicular development was examined using quantitative polymerase chain reaction (qPCR) assays. All data were analysed using the MIXED procedure in Statistical Analysis System (SAS) using terms for treatment as well as time for repeated measures. Blood metabolites and metabolic hormones generally reflected the improved metabolic status of the calves on the high plane of nutrition though the concentrations of reproductive hormones were not affected by diet. Calves offered HI had greater mean (SED) slaughter weight (112.4 v 87.70 (2.98) kg; P < 0.0001) and testicular tissue weight [29.2 v 20.1 (2.21) g; P = 0.0003], than MOD. Relative mRNA abundance data indicated advanced testicular development through up-regulation of genes involved in cellular metabolism (SIRT1; P = 0.0282), cholesterol biosynthesis (EBP; P = 0.007), testicular function (INSL3; P = 0.0077) and Sertoli cell development (CLDN11; P = 0.0054) in HI compared with MOD calves. In conclusion, results demonstrate that offering dairy bred male calves a high plane of nutrition during the first three months of life not only improves growth performance and metabolic status, but also advances testicular development consistent with more precocious sexual maturation.

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Section: Discussionmentioning

confidence: 99%

Effect of plane of nutrition during the first 12 weeks of life on growth, metabolic and reproductive hormone concentrations, and testicular relative mRNA abundance in preweaned Holstein Friesian bull calves

Coen

Keogh

Byrne

et al. 2021

Journal of Animal Science

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“…Метаболический синдром сопровождается дисфункцией эндокринной системы, в том числе андрогенным дефицитом у самцов (45,46). Подробно гормональный статус высокопродуктивных быков современной селекции нами описан в предыдущих исследованиях (47)(48)(49)(50). Эндокринная система -важнейшее регуляторное звено, поддерживающее гомеостаз.…”

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Metabolic Profiles and Sperm Production in Imported Holstein Bull Sires Under Different Climatic and Geochemical Conditions of Russia and Kazakhstan

Абилов¹

2021

S-h. biol.

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В современных условиях потенциал высокопродуктивных животных, приспособленных к промышленной технологии содержания, должен использоваться наиболее эффективно и не зависеть от географического положения и агроклиматических ресурсов региона. В представляемом нами исследовании установлено, что отрицательный эффект региональных климатических и геохимических факторов можно минимизировать при соблюдении всех технологических регламентов. Полученные результаты расширяют представления об особенностях метаболизма быков-производителей в различных геоклиматических условиях умеренной циркуляционной зоны между 55.86 и 51.18° с.ш., что может представлять интерес для практики разведения голштинской породы в странах с аналогичными природными факторами. Мы сравнили адаптационный статус быков голштинской породы (n = 122) зарубежной селекции в возрасте 3-9 лет в условиях Центральной России (АО «Головной центр по воспроизводству сельскохозяйственных животных», Московская обл.), Среднего Урала (ОАО «Уралплемцентр», Свердловская обл.) и Северного Казахстана (РЦПЖ АО «АсылТулик», Акмолинская обл.). Был проведен биоэлементный мониторинг по содержанию Ca,

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Content of endogenous hormones in the blood serum of milking breeds bulls-producers in the conditions of Tatarstan region

Абилов

Зарипов²,

Дунин³

et al. 2020

Agrarnaâ nauka

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Содержание эндогенных гормонов в сыворотке крови у быков-производителей молочных пород в условиях Республики Татарстан РЕЗЮМЕ Актуальность и методика. Исследования проведены на 35 быкахпроизводителях молочных пород (голштинская черно-пестрой масти, холмогорская татарстанского типа с прилитием голштинской крови и чернопестрая) в возрасте 1,8-8 лет в осенний сезон года в условиях Республики Татарстан (Поволжье). Работа посвящена изучению концентрации эндогенных гормонов (тестостерона, эстрадиола, тироксина) и их предшественника холестерина в сыворотке крови в день взятия семени и их взаимосвязь с репродуктивной функцией. Результаты. Установлено, что в зависимости от породы имеются различия по концентрации эндогенных гормонов в сыворотке крови. Общее число сперматозоидов в эякуляте имеет положительную связь с содержанием тестостерона в сыворотке крови в день взятия семени: чем выше уровень тестостерона, тем больше общее число сперматозоидов в эякуляте (P < 0,001). Самый низкий уровень эндогенных гормонов и холестерина зарегистрирован у быков-производителей голштинской породы голландской селекции. Возраст существенно влияет на содержание эндогенных гормонов: на концентрацию тестостерона в сыворотки крови, эстрадиола и тироксина (P < 0,05). Не выявлена связь возраста с содержанием холестерина. Предлагается при андрологической диспансеризации у быков-производителей проводить мониторинг содержания эндогенных гормонов в сыворотке крови как дополнительный тест для диагностики репродуктивной функции животных. Content of endogenous hormones in the blood serum of milking breeds bulls-producers in the conditions of Tatarstan region ABSTRACT Relevance and methods. 35 bulls-producers of milking breeds (holstein of black-and-white paint, holmogorskaya of Tatar type with flow of holstein blood, black-and-white) were inspected in the age 1,8-8 years old in the autumn season in conditions of Tatarstan Republic (Volga region, Povolzhye). The subject of the work is to research the concentration of endogenous hormones (testosterone, estradiol, thyroxin) and their precursor-cholesterol in the blood serum in the day of semen collection and their intercommunication reproductive function. Results. Was established that, depending of the breed there are differences in concentration of endogenous hormones in the blood serum. Total number of spermatozoids in ejaculate has positive relation with testosterone content in the blood serum in the day of collection semen: the higher level of testosterone, the higher concentration of spermatozoids in ejaculate (P < 0.001). The lowest level of endogenous hormones and cholesterin is registered in holstein breed of Holland selection. The age wields major influence on content of endogenous hormones: on concentration of testosterone in the blood serum, of estradiol and thyroxin (P < 0.05). Unascertained is interaction of the age and the containing of cholesterin. Suggested during andrological health examination of bulls-producers to monitor the content of endogenous hormones in the blood serum as extra te...

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Concentration of Testosterone and Cholesterol in Blood Serum of Servicing Bulls Depending on Their Type of Productivity, Age and the Season

Cited by 4 publications

References 0 publications

Effect of plane of nutrition during the first 12 weeks of life on growth, metabolic and reproductive hormone concentrations, and testicular relative mRNA abundance in preweaned Holstein Friesian bull calves

Effect of plane of nutrition during the first 12 weeks of life on growth, metabolic and reproductive hormone concentrations, and testicular relative mRNA abundance in preweaned Holstein Friesian bull calves

Metabolic Profiles and Sperm Production in Imported Holstein Bull Sires Under Different Climatic and Geochemical Conditions of Russia and Kazakhstan

Content of endogenous hormones in the blood serum of milking breeds bulls-producers in the conditions of Tatarstan region

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